Process for tanning of fish-skins or the like.



"run srnrus PATENT curios.

KBISTIAN BENDIXEN, or COPENHAGEN, DENMARK, ASSIGNOR T0 FIRM s-xrNn-y FABEIKEN UNICUM, KR. BE1\TDIXEN, r. 13ENDIXEN & 00., or COPENHAGEN,

DENMARK.

No Drawing.

To all whom it may concern:

Be it known that I, KRISTIAN BENDIXEN,

a subject of the King of Denmark, residing of sharks, porpoises, whales, etc., as it renders it possible to utilize and work up the skins of such fish and animals in any desired;

manner. a

The process is as follows:

The salted skins or hides are soaked in water until they are rendered quite fresh again and in the case of the skins of the I of any preferred shark these are stretched upon frames and dried. After this the spikes or scales are removed with a clean blunt scraper or tanners knife. lukewarm water until they are rendered perfectly soft and are then worked over a beam. They are next plunged into a suitable depilatory and antiseptic solution consisting say of 200 liters of water containing either a kilogram of sodium sulfid or a kilogram of white or raw red arsenic, or half akilogram of each of these. In this depilatory and'antiseptic solution, about three" days, the skins however being turned twice daily.

After the expiration of skins or hides are put into a solution of 200 liters of water and a-suitable quantity of slaked lime to open the fibers of the skins the three days, the

andin this solution they are also left for liter of hydrochloric acid and are agitated for about 5 minutes in this solution to dissolve and remove as much as possible of such lime as would otherwise remain in the pores and interfere with the pliability of the ultimate roduct, and are then bated 'in a batin mill containing 100 liters ofwater, 5- buc (et of poultry'dung and 1} kilogram chemical bating compound heated to a temperature of about 18 C.-

After hating, the skins are first washed The skins are next put into spread out, dried,

Y rubbed the skins are to remain for rnocnss FOR TANNING or rIsH-sKi s on THE LIKE.

Specification of Letters Patent. Patented J 1111B 19, 1917. Application filed February 19, 1912. Serial No. 878,473. I v i in clean lukewarm water and then in a s0- lution of :1, liter of hydrochloric acid .and L 200 liters of water.

- The skins are then put into a vat contain- I ing a mild dilute solution (about 5 or 6 barkometer) of a conventional tanning ma terial, to which liquid a suitable tanning materia-l is added every third day until the skins are thoroughly tanned.

, As an alternative, after treatment in the i hydrochloric solution, the. skins may be placed in a mill with about 4'kilo-grams of salt and 40 liters of Water,,and milled for about 10 minutes and thentreated with three solutions gradually of chrome-tanning material. After this the skins are again milled for about 8 hours and are then left for the night in the mill, milled again on the fo-llow-' -mg day for. about 2 hours and thencompletely tanned.

The skins are next put into a mill with pure lukewarm water until they are entirely freed from acid, and are then milled for about 6 hours in a mild relatively dilute solution (about5 or 6-barkometer) of sumach extract and water. After this they are colored and then: smeared with oil and polished and bleached. Finally they are with one' part of albumen and -10 parts .of Water or of skimmed milk to render the skins supple and to prepare them for coloring. -They are then glazed and grained.

If the grain 1.- A process fortanmng and permanently rendering soft and pliable fish skins and the like consisting tory solution, then treating them for a further period of about three days in a solu-.- tion of water and slaked lime, turningthe hides during such treatments, agitating the does not come outclearly the skins are placed for about 5 minutes in a United States 'of Y damped and smoothed out,

in softening the skins, treatingthem for about three days in a depilahides for a brief period in a sollition of water and hydrochloric acid and then bat- .ing them in a. mill containing water, poultry dung and any preferred chemical hating compound substantially as described.

2. A process for tanning and permanently rendering soft and pliable fish skins and the like consisting in softening the skins, treating them for about three days in .a solution of water and sodlum sulfid, then treating them. for a further. period of about three.

days in a solution of water and slaked lime, turning the hides :twice daily during such treatments, agitating the hides for about five minutes in a solution of water and hydrochlo'ric-acid and then bating them in a mill containing water,- poultry dung and a chemical hating compound substantially as described,

3. A process for tanning and ermanently rendering soft and pliable fish skins and the like consisting in softening the skin's, treating them for about three days in a depila-' tory solution, then treating 'them for a further period of about three days in a solution of water and slaked lime, turning the hides daily during such treatments, agitating the hides for a brief period in a solupletelytanned substantially as-described.

rendering soft and pliable fish v 4. A process for tanning and permanently rendering soft and pliable fish skins and the like, consisting in softening the skins, treating them for about three days in a solution ofwater and'sodium sulfid, then treating them for a further period of about three days in a solution of water and slaked lime,

turning-the hides at least twice dail during such treatments, agitating the hides for about five minutes in a-solution of water and hydro-chloric acid, then hating them in a mill containing water, poultry dung and a chemical hating compound, then removing them into pure lukewarm water, then into a solution ofhydro-chloric acid and water and then placing them in a tanning vat to which tanning material is added every third day until the skins are completely tanned substantially .as described.

5. A process for tanning and permanently skins and the like consisting in softening the skins, treating them for about three days in a depilatory solution, then treating them for a further period of about three days in a solution of water and slaked lime, turning the hides at least during such treatments, agitating the hides for a brief period in a-solution of water and hydrochloric acid, then hating them in a llllll contalnmg water,

)oultr dun and a chemical hatin comtanned substantially as described.

6. A process for tanning and permanently rendering soft and pliable fish skins and the like, consisting in softening the'skins treating them for about three days in a solution of water and sodium sulfid, then treating them .for a further period of about three days in a solution of Water and slaked lime,

turning the hides at least twice daily during such treatment, agitating the hides for about five minutes in a solution of water and bydrochloric acid, then hating them in a mill containing water, poultry dung and a chemical hating compound, then washing them in pure lukewarm water and afterward with a solution of hydrochloric acid and water and then milling them in a mill containing a suitable solution of salt to which a suitable chrome tanning material is added, the milling being then continued until the skins are fully tanned substantially as described.

7. A process for tanning and ermanently rendering soft and pliable fish s 'ns and the like consisting in softening the skins, treating them for about three days in a depilatory solution, then treating them for a further period of about three days in a solution of water and slaked lime, turning the hides during such treatment, agitatin the hides for a brief'period in an acid so ution, then bating them for a short time with a mild hating solution, then washing them in pure lukewarm water and afterward with an acid solution, then milling them in a mill containing a suitable solution at a strength of about 6barkometer of tanning materia 8. A process for tanning and permanently rendering soft and pliable fish skins and the like, consisting in softening the skins, treating them for about three days in a solution ofwater and sodium sulfid, then treating them for a further period of about three days in a solution of water and slaked lime,

, turning the hides at least twice daily during such treatments agitating the hides for about five minutes in a solution of water and hydrochloric acid, then hitting them in a mill containing water, poultry dung and a chemical hating compound then washing them in pure lukewarm water and afterward with a solution of hydrochloric acid and water, then milling them in a mill containing a suitable solution of salt to which a suitable chrome tanning material is added,

the milling being then continued until the from acid and treating them for about six hours in a solution of extract of sumach and water substantially as described.

9. A process oftanning and thereby ren: dering soft and pliable whale, fish-skins, and the like, consisting in subjecting the skins to depilatory and plumping steps; and thereafter subjecting them tothe action of a Weak solution, say about 6 barkometer, of tanning material until the skins are completely tanned. v

- 10. A process of tanning and thereby rendering soft and pliable Whale, fish-skins, and the like consisting in subjecting the skins to preparatory steps; and then proceeding with the actual tanning by subjecting them for a prolonged period tothe action 'of a materially weak solution of tanning material,

meanwhile maintaining said solution at astrength of about 6 barkometer until the tanning is complete.

skins at a temperature of about 20 11. A process of tanning and thereby rendering soft and pliable Whale, fish-skins and the like, consisting in mildly hating the very mild solution of a mild bating agent; and thereafter subjecting them to the prolonged action 'of a very mild tanning solution until completely tanned.

12. A process for rendering Whale, fish; skins and the like permanently soft, tough and pliable by a tanning operation, which consists in mildly bating at a low temperature, and thereafter subjecting the skins to the continued influence of a Weak tanning solution.

Gina

In testimony whereof, I affix my signa- -v ture, in presence of a Witness.

KRISTIAN BENDIXEN.

Witness P. BENDIXEN. 

